patch 9.0.0261: bufload() reads a file even if the name is not a file name

Problem:    bufload() reads a file even if the name is not a file name. (Cyker
            Way)
Solution:   Do not read the file when the buffer name is not a file name.
            (closes #10975)
diff --git a/src/testdir/test_functions.vim b/src/testdir/test_functions.vim
index 38cd793..6897040 100644
--- a/src/testdir/test_functions.vim
+++ b/src/testdir/test_functions.vim
@@ -2368,6 +2368,13 @@
   exe 'bwipe ' .. buf2
   call assert_equal(0, bufexists(buf2))
 
+  " when 'buftype' is "nofile" then bufload() does not read the file
+  bwipe! XotherName
+  let buf = bufadd('XotherName')
+  call setbufvar(buf, '&bt', 'nofile')
+  call bufload(buf)
+  call assert_equal([''], getbufline(buf, 1, '$'))
+
   bwipe someName
   bwipe XotherName
   call assert_equal(0, bufexists('someName'))